OC-212: upgrade to openclover 4.5.1

[marek-parfianowicz]

Testing done

### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] Please describe what you did
- [x] Link to relevant issues in GitHub or Jira
- [x] Link to relevant pull requests, esp. upstream and downstream changes
- [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[marek-parfianowicz]

Upgrade to OpenClover 4.5.1. This bug-fix release fixes an instrumentation problem when the 'record' keyword is used in a context different than record class declaration (for instance, as a variable name). A few other fixes have been made in this release too. For details see http://openclover.org/doc/openclover-4.5.1-release-notes.html.

[marek-parfianowicz]

OC-212 = openclover/clover#212